55353720 has 64 divisors (see below), whose sum is σ = 168192000. Its totient is φ = 14571648.

The previous prime is 55353703. The next prime is 55353743. The reversal of 55353720 is 2735355.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6561 + ... + 12399.

It is an arithmetic number, because the mean of its divisors is an integer number (2628000).

Almost surely, 2^55353720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55353720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84096000).

55353720 is an abundant number, since it is smaller than the sum of its proper divisors (112838280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55353720 is a wasteful number, since it uses less digits than its factorization.

55353720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932 (or 5928 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 30.

The square root of 55353720 is about 7440.0080645118. The cubic root of 55353720 is about 381.1087653872.

The spelling of 55353720 in words is "fifty-five million, three hundred fifty-three thousand, seven hundred twenty".